SEARCH Articles Figures Tables 2- -3-oxobutyric acid ethyl 2- Diazo-3-oxobutyrates 2-Oxobutyrate 2-Oxobutyrate from threonine 2-oxobutyrate synthase 4- -4-oxobutyric acid 4- -4-oxobutyric acid derivatives A-Oxobutyric acid Ethyl 2-diazo-3-oxobutyrate Ethyl 4-chloro-3-oxobutyrate Methyl 2-diazo-3-oxobutyrate, copper Methyl 4-bromo-3-oxobutyrate Oxobutyrates Oxobutyrates